Tag Archives: downlink

How Downlink Control Information or DCI in LTE?

Downlink Control Information or DCI in LTE The PDCCH carries Downlink Control Information or DCI to indicate the resource assignment in UL or DL for one RNTI. A DCI can convey various pieces of information, but the useful content depends…

Dedicated Control Channel (DCCH) in GSM

SDCCH (Stand-alone Dedicated Control Channel) Uplink and Downlink. Used for call setup, authentication, ciphering location update and SMS. SACCH (Slow Associated Control Channel) Downlink and Uplink. Used to transfer signal while MS have ongoing conversation on traffic or while SDCCH…

What is the difference between 4G and 4G LTE?

Many people use the terms 4g and 4g interchangeably, but they are not the same. Lets find out the difference…. Features of 4g 4G is the next step above and a 3g replacement, offering faster speeds for users who stream…

How Sub-Carrier Allocation in Wimax?

Sub-Carrier Allocation Mode 1 DL PUSC – Downlink partial Usage Sub-Channels The downlink PUSC replacement zone is unique, that must exist in the frame structure specified by the protocols. DL PUSC with all SC – PUSC with all sc indicates…

LTE Downlink & Uplink Physical Channel

LTE Downlink Physical Channel Physical Downlink Shared Channel ( PDSCH) This channel is used for unicastand paging functions. Carries the DL-SCH and PCH. QPSK,16-QAM,and 64-QAM Modulation. Physical Downlink Control Channel (PCSCH) Informs the UE about the resource allocation of PCH…

How Many LTE Downlink Transport Channel ? How its Work?

There are major four channel in LTE Downlink trasport channel. which list below with its work in short. Paging Channel ( PCH) Supports UE discontinuous reception (DRX) to enable UE power saving. Broadcasts in the entire coverage area of the…

How Common Control Channel (CCCH) works in GSM ?

RACH(Random Access Channel) Uplink only. Used by the MS when making its first access to the Network. The reason for access could be initiation of a call or a page response. AGCH (Access Grant Channel) Downlink only. Used for acknowledgement…

LTE Downlink Logical Channel

Paging Control Channel(PCCH) A downlink channel that transfers paging information and system information change notifications. This channel isused for paging when the network does not know the location cell of the UE Broadcast Control Channel (BCCH) Provides system information to…

List of Uplink and Downlink Physical Channel of WCDMA

Downlink Physical Channel of WCDMA Downlink Dedicated Physical Channel: Downlink DPCH Downlink Common Physical Channel: Common Control Physical Channel (CCPCH) Synchronization Channel ( SCH) Paging Indicator Channel (PICH) Acquisition Indicator Channel (AICH) Common Pilot Channel (CPICH) High-Speed Packet Downlink Shared Channel…

How Many Broadcast Channels & what’s it work in GSM ?

BCCH(Broadcast Control Channels) Downlink Only. Broadcast information of the serving cell (System Information). Transmitted on timeslot zero of BCCH carrier. Read only by idle mobile at least once every 30 secs. SCH (Synchronization Channels) Downlink Only Carries information for frame…

Specifications of WCDMA

Channel Bandwidth  5 MHz Duplex Mode  FDD and TDD Downlink RF Channel Structure  Direct Spread (DS) Chip Rate  3.84 Mcps Frame Length  10 ms Spreading Modulation  Balanced QPSK (downlink) Dual-channel QPSK (uplink) Complex spreading circuit Coherent detection  • User dedicated…

Main Characterictics of WCDMA

Support two basic modes: FDD and TDD modes High chip rate (3.84 Mcps) and data rates (up to 2 Mbps) Employs coherent detection on uplink and downlink based on the use of pilot symbols Inter-cell asynchronous operation Fast adaptive power…